72 mk1 stock on bakerloo?

There are no 1967 Stock trailers running with 1972 Stock on the Bakerloo.
The only connection is, inner DM car 3338 has the transplanted cab of '67 Stock car 3061.
Also, the AiT Asset Inspection Train (currently residing at Northfields), has two 1967 DM cars in the middle (3079, 3179)

Charcoal grab rails, interior panels mainly white but with a “black specks” pattern (that’s the best I can describe it as), a slightly different flooring (a sort of mauve/grey colour if my memory is remembering right), and a seat moquette similar to the pink one used on some 59 stock. I think the door kick plates may have been different too, but I forget what now!

Some of these features survived well into Bakerloo days, originally I think initially they changed just the seat moquette and the grab rails.

If I remember rightly there is a picture in one of the 1990s Brian Hardy LU Rolling Stock books.

Sorry to be a little vague, my memory going back 25 years is a little hazy. They only worked on the Northern in that form for a pretty short time, though I do remember going on them a handful of times. At the time it was quite a novelty to have a Northern Line train that wasn't falling to bits, suffering from wood-worm, or whatever!